<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>

      <tree-table
        class="treeTable"
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
      >
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted===false" style="color:lightgreen"></i>
          <i class="el-icon-error" v-else style="color:red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
          <el-tag type="success" size="mini" v-else-if="scope.row.cat_level===1">二级</el-tag>
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>
        <template slot="opt" slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
        </template>
      </tree-table>

       <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.Pagenum"
      :page-sizes="[3, 5, 10, 15]"
      :page-size="queryInfo.Pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
    </el-card>

    <el-dialog
  title="添加分类"
  :visible.sync="addCateDialogVisible"
  width="50%" @close="addCateDialogClosed">
  <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
  <el-form-item label="分类名称:" prop="cat_name">
    <el-input v-model="addCateForm.cat_name"></el-input>
  </el-form-item>
  <el-form-item label="父级分类:">
    <el-cascader
    expand-trigger="hover"
    v-model="selectedKeys"
    :options="ParentCateList"
    :props="cascaderProps"
    @change="parentCateChanged" clearable change-on-select></el-cascader>
  </el-form-item>
 </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="addCateDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addCate">确 定</el-button>
  </span>
</el-dialog>

  </div>
</template>
<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      catelist: [],
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible:false,
      addCateForm:{
          cat_name:'',
          cat_pid:0,
          cat_level:0,
      },
      addCateFormRules:{
          cat_name:[
              {required:true,message:'请输入分类名称',trigger:'blur'}
          ]

      },
      ParentCateList:[],
      cascaderProps:{
        value:'cat_id',
        label:'cat_name',
        children:'children'
      },
      selectedKeys:[]
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.$message.success('获取商品分类成功！')
      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newSize){
        this.queryInfo.pagenum=newSize
        this.getCateList()
    },
    handleCurrentChange(newPage){
        this.queryInfo.pagenum=newPage
        this.getCateList()
    },
    showAddCateDialog(){
        this.getParentCateList()
        this.addCateDialogVisible=true
    },
    async getParentCateList(){
        const {data:res}=await this.$http.get('categories',{params:{type:2}})
        if(res.meta.status!==200){
          return this.$message.error('获取父级分组数据失败！')
        }
        this.ParentCateList=res.data
    },
    parentCateChanged(){
      if(this.selectedKeys.length>0){
        this.addCateForm.cat_pid=this.selectedKeys[this.selectedKeys.length-1]
        this.addCateForm.cat_level=this.selectedKeys.length
        return
      }else{
        this.addCateForm.cat_pid=0
        this.addCateForm.cat_level=0
      }
    },
    addCate(){
      this.$refs.addCateFormRef.validate(async valid=>{
        if(!valid) return 
        const {data:res}=await this.$http.post('categories',this.addCateForm)
        if(res.meta.status!==201){
          return this.$message.error('添加分类失败！')
        }
         this.$message.success('添加分类成功！')
         this.getCateList()
         this.addCateDialogVisible=false
      })
    },
    addCateDialogClosed(){
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys=[]
      this.addCateForm.cat_level=0
      this.addcateform.cat_pid=0
    }
  }
}
</script>
<style lang="less" scoped>
.treeTable{
    margin-top: 15px;
}
.el-cascader{
  width: 100%;
}
</style>